Switching to Most Compatible can simplify delivery to older systems, but it changes both photo and video capture formats. Review the storage and feature tradeoffs before making it permanent.
Where is the HEIC setting on iPhone?
Open the Settings app, select Camera, and then choose Formats. Tap Most Compatible to make future standard photos use JPEG and future videos use H.264. To return to the space-saving formats, choose High Efficiency.
Apple notes that the setting appears on iPhone and iPad models that can capture HEIF or HEVC. Labels or surrounding settings may vary by iOS version, but Camera → Formats is the current documented path.
Does Most Compatible convert existing HEIC photos?
No. The Camera format setting controls new captures. Photos already stored as HEIC remain in that format until you export or convert them.
For existing files, use an app workflow that creates JPG outputs. Batch HEIC to JPG Converter can convert HEIC to JPG on your iPhone one photo at a time or as a batch.
What changes when you choose Most Compatible?
JPEG and H.264 are more broadly compatible with older devices and operating systems. The tradeoff is that Apple’s High Efficiency formats provide better compression, so older formats can use more storage for comparable visual quality.
The switch also applies to new video capture, not just photos. If your only problem is an occasional JPEG-only upload, keeping High Efficiency and converting selected photos may be the more targeted workflow.
When is conversion better than changing Camera settings?
Convert copies when most of your apps support HEIC but a particular website, recipient, or archive requires JPEG. This preserves the storage benefit of HEIC for the main library while producing a compatible file where needed.
Use a reusable conversion routine when you regularly need the same JPG quality, resolution, and metadata choice. That keeps the output predictable without changing how every future photo is captured.
Source for iPhone format behavior: Apple Support: Using HEIF or HEVC media on Apple devices.
Common questions
What setting stops new iPhone photos from being HEIC?
Open Settings → Camera → Formats and select Most Compatible. New standard photos will use JPEG.
Will Most Compatible change my old photos?
No. It affects future capture. Existing HEIC photos remain unchanged until you convert or export them.
Can I switch back to HEIC later?
Yes. Return to Settings → Camera → Formats and choose High Efficiency.
Does Most Compatible affect video?
Yes. Apple states that new videos use H.264 when Most Compatible is selected, rather than the High Efficiency HEVC format.
Can I keep HEIC enabled and still make JPEG copies?
Yes. Keep High Efficiency capture and use Batch HEIC to JPG Converter when you need a JPG copy of one photo or a batch.